Desenvolvimento de testemunhador a vibração portátil

Mahiques, Michel Michaelovitch de; Tolentino, Clodoaldo Vieira; Vilalta, Luis Eduardo

doi:10.1590/s1679-87591989000100007

Cited by 1 publication

(1 citation statement)

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“…To verify the mechanism that may influence the in-depth deposition of pellets we evaluated the sediment stratification and the vertical distribution of heavy minerals, comparing it to the depth distribution of pellets. Using a corer 27 , five vertical samples of the sediment (up to 120 cm depth) were taken at each 20 m interval cross-shore, with the higher one located in the same area where the depth distribution analysis was conducted in Santos Bay. The sediment stratification was recorded and the amount of magnetic minerals was estimated via the values of magnetic susceptibility, measured by a MS2-C analyzer (Bartington, Oxon, England) at each 2.5 cm intervals.…”

Section: Methodsmentioning

confidence: 99%

Three-dimensional distribution of plastic pellets in sandy beaches: shifting paradigms

Turra

Manzano

Dias

et al. 2014

Sci Rep

247

105

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Plastic pellets are worldwide contaminants that accumulate in the ocean, especially in sandy beaches, where their historic standing-stock quantification relies on surface sediment samples. We demonstrated these particles present a three-dimensional instead of a simple along-across shore distribution, being found as deep as 2.0 m, with surface layers accounting for <10% of the total abundance in the sediment column. This gradient seemed to be more related to oceanographic rather than anthropic processes, suggesting a general pattern whose applicability to microplastics and sedimentary environments as a whole should be investigated. This poses criticism in the exactness of standing-stock records and demands urgent discussion of sampling protocols.

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Section: Methodsmentioning

confidence: 99%